Spring grader and moldboard



Sel'tf 131 1932' G. E. DEAN 1,876,867

SPRING GRADER AND MOLDBOARD Filed oct. 7, 1931 Patented Sept. 13, 1932 frisuren starts invase? GEORGE n. DEAN, or WALKER rowNsHir, KENT COUNfrmNIGHrGAN, AssrGNon errantes s wrtnn'rnfor GnANnnArIns, rfrrcrrrGAN sparite GRZ-inne Ann ivre-Innereien .eppucauonsieaoctober "l, 1931. semi Noget' l This invention relates or pertainsl to a scraping mechanism adapted to be used to scrape dirt, snow or the like and more specifically this invention deals with the 'moldboard and its mounting whereby the moldboard, this board carrying the scraper or cutting blad-e, may be pivotally mounted upon the depending arm of the vehicle carrying the same, usually a grader or scraper- One of the principal Afeatures of my inven-` tion resides in the construction of my moldboard, this moldboard being formed yin two parts, namely, an upper moldboard and a lower moldboard. These moldboardsV are connected together only by means of my double tension spring and hence may have movement relative to each other. rlfhus, by separating my moldboard into two parts l am able to utilize a lower moldboard as a backing means or reinforcing means tor the cutting blade whereas the upper moldboard serves in the capacity of providing an integral mounting member for the upper ends of the several double tension springs. It will be noted'that the lower edge of the upper moldboard and the upper edge of the lower moldboard are closely adjacent whereby the dirt or the like will not pass therebetween. Moreover, the upper moldboard is slightly advanced forwardly of the lower one, whereby the tendency of the dirt to pass between the two moldboards will be curbed.

Also, l torm the lower moldboard in two or more sections, each section supporting a cutter blade of the same length and each section being separately supported by means oi springs upon the upper moldboard. rl`hus, as

each unit cutter blade is separately mounted,-

any obstacle in the path of one will merely cause that particular blade to be forced upwardly and rearwardly while the others will operate as usual.

Another material feature of my invention resides in the arrangement of the several elements whereby a very compact structure is had. In this regard note that the adjusting means for the brackets are located directly behind the lower moldboard and also that these brackets do notl extend above the upper edge of the upper moldboard. Thus the structure islocated'in a minimum height and hence the moldboard arm, this arm serving asa supporting means theretor, may be lo'- ra're vv'ori-fier.

cated relatively close to the ground, thereby providing a sturdier construction.

vAnother advantage which l obtain 'lies in my adjustment for the cutting blade whereby the same may be moved downwardly relative to the lower moldboard which supports the same.

Other objects will appear, or become apparent `or obvious during the description of the device shown in the accompanying drawi ing,in.which, f

Fig. l is a view incross section through my novel moldboard mounting means,this view being taken along the planeot line V1--1 of Fig.2. y Fig. 2 is a view ofzthe mountingmeans taken fromthe rear, this being illustrated by the 'arrow-A in Fig. 1.

Fig. 3 is a front view of one end of the cutting blade, this view illustrating the ad= justment which may be made'between the blade and the lower moldboard which sup# ports the same.

Like numerals refer' to out the several views. Y

Referring particularly to Figs. 1 and 2, 10 designates a circle member adapted to be re'volubly supported upon the frame ot the grader-or scraper (not shown) andl ll'indicates amoldboard arm depending therefrom. Only a single arm 11 is shown in the draw, ing but itis to be understood that at least two of these arms are to be used with the circle member 10. f

Bracket members are pivotally mounted on the arm 11 by means of a pin 12, having'a retaining Cotter key 13 therein, andonly tWo opposed bracket members are shown in the drawing although two bracket members are used with each of the depending moldboard arms 11'. y

.Each of the opposed bracket4 members has an upper arm 14 and-'a depending lower arm llike parts through- 25' as clearly shown in Fig. 1 ot the'drawng.

The upper arms 14 of the opposed brackets are rigidly attached to the upper moldboard 16 as by the bolts 15. The upper moldboard extends underneath the supporting arms 11 and is of angular shape. The bracket members extend on either side of the depending arm 11. See Fig. 2.

The upper moldboard 16 is provided with clamps 17 which receive the upper ends of the double tension springs 18, the clamps being held to the upper moldboard by means of the bolts 19, these bolts having their heads countersunk. See Fig. 1. Y

The lower moldboards 30 consist of hat, rectangular members having clamps 31 s aced thereon in conformity with the clamps l? on the upper moldboard 16 and the clamps 31 receive the lower curvedends of the springs 18. See Fig. 2.

The moldboards 30 have a series of holes 32 located therein, these holes being adapted to receive the bolts 33. The blade members 34 also have a series of holes 35 therein, these holes receiving bolts 33 as shown in Fig. 1. Thus the blades 34 may be vertically adjusted to `three different positions. Also, as each blade is individually carried or supported, it may iex from its normal position without disturbing the positions of the other blades, these blades continuing their scraping function.

The arms 25 of the bracket member, which is pivotally mounted upon the moldboard arm 11, has a curved lower portion 36, this portion being provided with a series of openings or holes 37. The lower end of the arm 11 has a single opening in alinement with the arc which passes through the openings 37. An adjusting pin 38, having a cotter key 39, is adapted to be received by one of the openings 37 and the single opening in the arm 11.

The operation of the mechanism just recited is easily understood'. The pin 38 may be removed and the bracket member shifted about its pivot 12 until it is at the desired angle. This angle is determined by the angle that one desires to set the scraper blade 84, this blade being set at different angles for different types of work, and next the pin 38 is inserted through the alined opening and the cotter key 89 placed in position thus preventing any accidental withdrawal.

Having thus revealed this invention, I claim as new and desire to secure the following combinations and elements or equivalents thereof, by Letters Patent of the United States.

I claim: Y

1. In combination, a support, a bracket pivotally connected to said support, an upper moldboard attached to said bracket, a lower moldboard, spring means connecting the lower moldboard to the upper moldboard, a blade member attached to said and means for adjusting the bracket relative lower moldboard to its support whereby the position of the blade is varied.

2. In combination, an upper moldboard having a depending flangeportion, a lower moldboard comprising two separate sections extending .beneath the upper moldboard, separate cutter blades attached to their corresponding sections and spring means connecting the respective sections to the upper moldboard.

3. In a device of the character described, an upper moldboard, a support, means connecting the upper moldboard to the support, a lower moldboard and spring means interconnecting the lower moldboard to the upper moldboard, said moldboards lying in substantially the same plane.

et. In a scraping mechanism, the combination of, a support, a bracket member pivotally connected to the said support, said bracket member having a laterally extending arm, an upper moldboard depending' from and rigid with said arm, a lo. er vmoldboard, a cutting blade rigidly attached to said lower moldboard, spring means interconnecting the ,l

lower and upper moldboard, and means for locking said bracket member to its support. In testimony whereof I affix my signature.

GEORGE E. DEAN. 

